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Drag is a force that acts parallel to and in the same direction as the airflow. The drag coefficient of an automobile measures the way the automobile passes through the surrounding air. When automobile companies design a new vehicle they take into consideration the automobile drag coefficient in addition to the other performance characteristics ...
In most high efficiency models or in vehicles with low drag coefficients, a very small grille will already be built into the vehicle's design, eliminating the need for a grille block. The grille in most production vehicles is generally designed to maximize air flow through the radiator where it exits into the engine compartment.
Drag coefficient (ratio) (ratio) (ratio) economics, top speed, range lower is better for moving into/through a fluid(air/water), higher is better for stopping/redirecting with a fluid Friction or Friction coefficient lbf or (ratio) lbf or (ratio) N or (ratio) acceleration, braking distance, traction, fuel consumption, tyre wear
Mercedes-Benz reported a drag coefficient of 0.19; [7] for comparison, the production vehicle with the lowest ever C d value was the GM EV1, at 0.195. While the Bionic had a much larger internal volume than the EV1, the Bionic's larger frontal area made the EV1 more aerodynamic overall, as drag is a product of the area and the drag coefficient.
The aerodynamics gave the best drag coefficient of any vehicle at the time. [citation needed] On its launch, its main competitors in Europe included the Fiat 128, Ford Escort, Renault 6 and Vauxhall Viva. The GS's aerodynamics enabled the car to make the best of the available power, but when introduced, the car was considered underpowered.
The Dynavia's shape resulted in a drag coefficient of just 0.26. [11] The car was designed to seat four people although the narrow body and curving roof-line limited passenger space. The tall greenhouse with its two-piece windscreen and backlite offered good outward visibility. [ 8 ]
Drag coefficients in fluids with Reynolds number approximately 10 4 [1] [2] Shapes are depicted with the same projected frontal area. In fluid dynamics, the drag coefficient (commonly denoted as: , or ) is a dimensionless quantity that is used to quantify the drag or resistance of an object in a fluid environment, such as air or water.
As the size of the car prohibited meaningful wind tunnel testing, the streamlined shape of the car was refined entirely through the use of computational fluid dynamics by MIRA Ltd, which has enabled the car to obtain a very low coefficient of drag of only 0.147 and a C d A value (drag coefficient × frontal area) of only 0.129 m 2. The fuel ...